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10

Time

LEARNING ObjEctIvEs

After studying this chapter, students will be able to...

y know about the 24-hour clock and the 12-hour clock format of time and their conversions
y convert time from one unit to another
y perform operations (addition and subtraction) on measures of time

21 st
Century Subject Enrichment
Skills
Warm Up Greenwich Mean Time or GMT

Greenwich Mean Time (GMT) According to the GMT
is the time at the Royal

Observatory in Greenwich, Country Difference with GMT
London. It is used as a India + 5 hours 30 minutes

standard to know the time Italy + 1 hour (CET)
GMT in different countries. A table Iraq + 3 hours
alongside shows how much each country’s

time is ahead (+) or behind (–) GMT. The China + 8 hours
clock on the left shows GMT. Use it to find Brazil – 3 hours
the local time in each country (mentioned on Egypt + 2 hours (EET)

the next page) and draw the clock hands to
show the correct time.

217
Time